祁连山中段西水林区高山林线土壤温湿度变化特征  

Variation Features of Temperature and Humidity of Soil for Alpine Timberline in Xishui Forest Region in the Middle Section of Qilian Mountains

作　　者：赵志强 刘贤德[1,2] 田青 赵维俊[2] 马剑 敬文茂 刘思敏 ZHAO Zhiqiang;LIU Xiande;TIAN Qing;ZHAO Weijun;MA Jian;JING Wenmao;LIU Simin(College of Forestry,Gansu Agricultural University,Lanzhou 730000,China;Gansu Province Qilian Mountain Water Conservation Forest Research Institute,Zhangye 734000,China;Key Laboratory of Desert and Desertification,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]甘肃农业大学林学院,甘肃兰州730070 [2]甘肃省祁连山水源涵养林研究院,甘肃张掖734000 [3]中国科学院沙漠与沙漠化重点实验室,甘肃兰州730000

出　　处：《水文》2021年第6期85-90,共6页Journal of China Hydrology

基　　金：甘肃省自然科学基金重大项目(18JR4RA002);中国科学院沙漠与沙漠化重点实验室开放基金项目(KLDD-2019);甘肃省科技计划项目(18JR2RG001)。

摘　　要：以祁连山西水林区高山林线为研究对象,利用土壤温湿度自动监测系统对高山林线处土壤温湿度进行连续1年监测,旨在探讨高山林线处土壤温湿度变化特征及其耦合关系。结果表明:10cm处土壤温度日变化呈正弦曲线变化趋势,20cm处土壤温度日变化呈现先降低后增加趋势,20cm以下土壤温度日变化不明显;各土层土壤温度年变化均呈先降低后增加再降低的变化趋势。不同土层土壤湿度的日变化趋势不明显,各土层土壤湿度为60cm>20cm>10cm>40cm;不同土层土壤湿度的年变化总体呈先增加后减小的趋势。不同土层的土壤温度和湿度耦合关系良好,呈现极显著正相关关系,并且随着土壤深度的增加,土壤温度与湿度的相关系数逐渐下降。The soil temperature and humidity at the alpine forest line was monitored continuously for 1 year by the automatic soil temperature and humidity monitoring system in the Qilian Mountain West Water Forest Area,aiming to explore the characteristics of soil temperature and humidity changes at the alpine forest line and its coupling relationship.The results show that the daily variation of soil temperature at 10cm has a sinusoidal trend,the daily variation of soil temperature at 20cm has a trend of decreasing and then increasing,and the daily variation of soil temperature below 20cm is not obvious;the annual variation of soil temperature at all soil layers has a trend of decreasing and then increasing and then decreasing.The daily changes of soil moisture in different soil layers are not obvious,and the soil moisture in each soil layer is 60cm>20cm>10cm>40cm;the annual changes of soil moisture in different soil layers have an overall trend of first increasing and then decreasing.The soil temperature and moisture in different soil layers are well coupled and show a highly significant positive correlation,and the correlation coefficient between soil temperature and moisture gradually decreases with the increase of soil depth.

关 键 词：高山林线 土壤温湿度 耦合关系 

分 类 号：S714.5[农业科学—林学]